. >>> a professor at ucsf campus won the nobel prize for medicine, shinya yamanaka a native of japan. he and a british researcher won for their discovery that mature specialized cells of the body can be reprogrammed to become any kind of cell. the committee said the winners have shown that specialized can turn back the developmental clock under certain circumstances and it also said the discoveries will provide new tools for scientists around the world. this morning a colleague of the bay area winner explained more about the significance. >>> it's a major breakthrough because it removes many of the ethical issues about the use of human embryonic stem cells and opens a whole host of things to understand human disease using these new stem cells that we couldn't even dream of before. >> the medicine award was the first nobel prize to be announced this year. >>> hugo chavez has won six more years as president of venezuela. the socialist chavez overcame a challenge from a moderate candidate. more than 80% of eligible voters went to the polls and thousands living abroadcast ballots at diplo